Description of Bicosoeca maris

Bicosoeca cells measuring 4.5-6.5 microns, D-shaped with an inconspicuous lip anteriorly. Anterior flagellum about 2-2.5 times cell length, held in a loose coil when cells are retracted to the posterior of the lorica. Posterior flagellum lies in a shallow longitudinal groove, which passes down the cell and attaches to the base of the lorica. The lorica has parallel sides, with a rounded posterior and a slightly everted anterior margin. It measures about 10 microns in length and is about half as wide.